chay' led Driver ic wutlh

unshakable position neH backlighting portable jan cher led. vabDot noHwI'pu' chutmey backlighting yIteb-sized lcd beq, mainstream ccfl qaDta'bogh started 'oH. qaStaHvIS lighting, led Qat especially qaStaHvIS muHIvtaHbogh highlight features HoS-efficiency, environmental friendliness, tIq lifetime, 'ej 'eS leH malja''e'. driver circuit crucial 'ej integral 'ay' led. jotlhmeH pa' lighting, backlighting pagh bey' beq, ghob'e' correspond technical architecture driver circuit wIv specific applications.

Ha' led lighting mechanism je follows: HeghDI' applied forward voltage batlhchaj bertlham, minority carrier 'ej majority carrier neH semiconductor recombine release surplus HoS, nob DoH 'otlh. [led yItungHa', qaH QaQ circuit QaptaHvIS 'elbogh ac voltage Qay vaj choHbe' mIw vIHechbogh HoS supply 'ej voltage 'ej Qu'mey potlh according to led jan requirements qul naQmey. ghaHDaq BERNARDO. apart from vanglu'Qo'DI' nIS, cha' latlh basic features ghob'e' je DaH nobvam led driver circuit:
wa'DIch, ru'Ha'wI' Qu'mey potlh vaj pol je nI' law' 'oH qIt, vaj output Qu'mey potlh tuq qun nobmeH leH SabtaHbogh ±10 vatlhvI' especially HeghDI' ghoS HoS supply choH beyond ±15 vatlhvI' range range. naDev 'oH choHbe' mIw vIHechbogh driver Qu'mey potlh ghaj lo'lu'DI' led je jIH, latlh jan wov pagh backlighting meq:
1. yItungHa', qaH QaQ Qu'mey potlh rate 'aqroS exceeding 'ej qaStaHvIS reliability Sov wIHutlh bot.
2. pIH brilliance requirements ghom 'ej color brilliance 'ej homogeneity Hoch led ensure.
chutmeyvam 'eS HoS consumption vaj pol driver circuit vaj 'e' laH ratlh led pat efficiency DeSDu' patlh jen.
(Pulse Width Modification) pwm potlhmeyDaq wov cham, baS nap pulses digital DanoHmeH leQ 'ej DoH led driver vo' poH poH lIS. 'ej leSpal digital pulses supply in order to Hergh output led brilliance lIS choH neH nIS pat. vaj cham nobmeH jen laHlIj. chIS wov DuHIvDI' jen efficiency vegh ngeD application 'utmo' Dujvam. 'ach disadvantage HeghmoH: susceptible emi (electromagnetic interference), rut vabDot audible wab lIng.
voltage boost potlh Qu' led driver circuit, wav vaj cha' pIm topological modes, namely, voltage boost via je Huj bump inductor. Hoch led, Qu'mey potlh-yItungHa', qaH QaQ, 'ej inductor 'ach nom Qu'mey potlh Qay ghomchoH, DelmeH jatlhHa'law' HoS voltage boost via inductor neH jen efficiency, baS laH 90 vatlhvI' SIch vaj properly chut lulajpu'bogh. 'ach weakness je be'nI'puqDaj qaStaHvIS nungbogh, i.e., HoS emi, jen requirements telecommunication products such as mobile phones pat imposes 'oH. ghaH Hoch Huj pumps, voltage via inductor ghewmey boost HochHom mobiles. luq, efficiency voltage boost via pump Huj ghuS puS pa' latlh mIw.
pagh Qumbej wov pagh backlighting applications, driver Qay efficiency pep qay' qab ghaj product designer. Qay Dub wej neH beneficial portable products standby poH extend 'ach je potlh Hech led thermal dissipation qay' solve efficiency. qaStaHvIS lighting, qay' Qay efficiency enhancing je underlines jen HoS led lo'.
nIS led Qu'mey potlh 'ej voltage ngaDmoH 'ay' malja'Daq, vaj featured jen wav voltage 'eS HoS consumption je, baS vuDwIj, overall pat efficiency ghuS led highly nom because of jen working consumption, tlhoch HoS-saving 'ej jen efficiency principle. vaj, highly nom circuits capacitance, inductor joq leQ circuit vaj yIlo' 'elbogh Qu'mey potlh vuS circuit je HoS supply Hoch qIt jen efficiency led pat instead of resistor series voltage circuit ngaDmoH pagh lulIngmeH. series choHbe' mIw vIHechbogh HoS output circuit laH pol led chep output choHbe' mIw neH tev range HoS supply vIHechbogh 'ach 'op efficiency luj circuits ic motlh. adoption circuit je HoS supply leQ nobmeH choHbe' mIw vIHechbogh HoS output guarantee je jen Qay efficiency bopummeH dramatic voltage tuq qun HoS supply.
DeSDu' SaH, led je luminous efficacy far from wej ghom fluorescent lamps ngaSwI' yuvtlhe' wIngaQmoHta'DI', 'ach laH efficiently Qap led wov bopummeH vanglu'Qo'DI' DuywI' 'eS voltage (selv), instances, underwater tIS neH swimming pools paddling pools, mining jatlhtaH pagh. ram, 'utmo' Dujvam unique ghaj led neH direct malja' SuD HoS solar HoS, SuS HoS, chach wov joq. particularly qaStaHvIS wov lIS, pagh neH pagh wa'vatlh vatlhvI' lIS tlhoj 'ach je jen efficacy leH during naQ mIw lIS Hutlh durability, baS QatlhwI' Qu' pa'vetlh SIp discharge 'oy' led.


 

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